Add more usings.

Author: larshg

features/include/pcl/features/intensity_gradient.h

@@ -114,7 +114,8 @@ namespace pcl
                                      const Eigen::Vector3f &normal,
                                      Eigen::Vector3f &gradient);
 
-    protected:
+      using PCLBase<PointInT>::num_threads_;
+
       ///intensity field accessor structure
       IntensitySelectorT intensity_;
   };

filters/include/pcl/filters/pyramid.h

@@ -139,6 +139,9 @@ namespace pcl
 
         inline const std::string&
         getClassName () const { return (name_); }
+
+      protected:
+        using PCLBase<PointT>::num_threads_;
 
       private:
 

filters/include/pcl/filters/radius_outlier_removal.h

@@ -72,6 +72,7 @@ namespace pcl
   class RadiusOutlierRemoval : public FilterIndices<PointT>
   {
     protected:
+      using PCLBase<PointT>::num_threads_;
       using PointCloud = typename FilterIndices<PointT>::PointCloud;
       using PointCloudPtr = typename PointCloud::Ptr;
       using PointCloudConstPtr = typename PointCloud::ConstPtr;

keypoints/include/pcl/keypoints/harris_3d.h

@@ -165,6 +165,8 @@ namespace pcl
       }
 
     protected:
+      using PCLBase<PointInT>::num_threads_;
+
       bool
       initCompute () override;
       void detectKeypoints (PointCloudOut &output) override;

registration/include/pcl/registration/correspondence_estimation.h

@@ -69,7 +69,6 @@ class CorrespondenceEstimationBase : public PCLBase<PointSource> {
   using PCLBase<PointSource>::input_;
   using PCLBase<PointSource>::indices_;
   using PCLBase<PointSource>::setIndices;
-  using PCLBase<PointSource>::num_threads_;
 
   using KdTree = pcl::search::KdTree<PointTarget>;
   using KdTreePtr = typename KdTree::Ptr;
@@ -323,6 +322,8 @@ class CorrespondenceEstimationBase : public PCLBase<PointSource> {
   clone() const = 0;
 
 protected:
+  using PCLBase<PointSource>::num_threads_;
+
   /** \brief The correspondence estimation method name. */
   std::string corr_name_;
 

surface/include/pcl/surface/poisson.h

@@ -231,6 +231,8 @@ namespace pcl
       }
 
     protected:
+      using PCLBase<PointNT>::num_threads_;
+
       /** \brief Class get name method. */
       std::string
       getClassName () const override { return ("Poisson"); }